mellow-world

Mellow World provides a suite of social media management tools focused on Instagram, enabling users to schedule posts, create content calendars, and cross‑post to platforms like Threads. The service offers a free tier with basic scheduling and paid plans for higher volume, analytics, and team collaboration. Documentation includes guides, pricing details, support resources, and a privacy policy, all hosted at www.mellow.world.

mellow-world is listed with 1 API on the APIs.io network. Tagged areas include Company, Social Media, Marketing, Scheduling, and Content Creation.

The mellow-world catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

mellow-world’s developer surface includes authentication, getting-started guide, documentation, pricing, signup flow, support, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.4/100 developing Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company Social Media Marketing Scheduling Content CreationSaaS

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 40.4/100 · developing

Contract Quality 4.7 / 21

Developer Ergonomics 6.5 / 17

Access Clarity 13.0 / 17

Operational Transparency 1.2 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 22.1 — up to +19.5 composite points
Developer Ergonomics scores 38.1 — up to +12.4 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/mellow-world/apis.yml: open an issue on github.com/api-evangelist/mellow-world to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

mellow-world API

mellow-world API as documented publicly: 6 operations. Contract generated from the documentation by API Evangelist (2026-10-31); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Mellow World Plans Pricing

3 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Mellow World Context

4 classes · 10 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

mellow-world API Rules

11 rules · 9 errors 1 warnings 1 info

SPECTRAL

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

PostApiHubV1PostsRequest

5 properties

JSON SCHEMA

PostApiHubV1PostsResponse

2 properties

JSON SCHEMA

PostApiHubV1ValidateRequest

5 properties

JSON SCHEMA

PostApiHubV1ValidateResponse

3 properties

JSON SCHEMA

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Mellow World Authentication

1 scheme

SECURITY

Mellow World Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Mellow World Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Login

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

Conformance

Scroll for all 7

Access & Security 6

Authentication, authorization, and security posture

Security

Authentication

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: mellow-world
name: mellow-world
image: https://www.mellow.world/og-hub-en.png
description: Mellow World provides a suite of social media management tools focused on Instagram, enabling users to schedule
  posts, create content calendars, and cross‑post to platforms like Threads. The service offers a free tier with basic scheduling
  and paid plans for higher volume, analytics, and team collaboration. Documentation includes guides, pricing details, support
  resources, and a privacy policy, all hosted at www.mellow.world.
url: https://artifacts.apis.io/mellow-world/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- Social Media
- Marketing
- Scheduling
- Content Creation
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/mellow-world-plans-pricing.yml
- type: Spectral
  url: rules/mellow-world-rules.yml
- type: JSONLD
  url: json-ld/mellow-world-context.jsonld
- type: Vocabulary
  url: vocabulary/mellow-world-vocabulary.yml
- type: DataModel
  url: data-model/mellow-world-data-model.yml
- type: Idempotency
  url: conventions/mellow-world-conventions.yml
- type: Conventions
  url: conventions/mellow-world-conventions.yml
- type: Security
  url: security/mellow-world-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/mellow-world-authentication.yml
- type: Conformance
  url: conformance/mellow-world-conformance.yml
- type: LLMsTxt
  url: llms/mellow-world-llms.txt
- type: SecurityTxt
  url: well-known/mellow-world-security.txt
- type: SecurityTxt
  url: well-known/mellow-world-mellow-security.txt
- type: WellKnown
  url: well-known/mellow-world-well-known.yml
- type: Hosts
  url: hosts/mellow-world-hosts.yml
- type: Vendors
  url: vendors/mellow-world-vendors.yml
- type: GettingStarted
  url: https://www.mellow.world/hub/prompts/chatgpt-dots-setup-checklist
- type: VulnerabilityDisclosure
  url: security/mellow-world-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/mellow-world-domain-security.yml
- type: Website
  url: https://mellow.world/
- type: Documentation
  url: https://www.mellow.world/guides
- type: Login
  url: https://www.mellow.world/hub/signin?return_to=%2Fhub%2Foverview
- type: Pricing
  url: https://www.mellow.world/hub/pricing
- type: PrivacyPolicy
  url: https://www.mellow.world/privacy
- type: SignUp
  url: https://www.mellow.world/hub/signin?mode=signup&return_to=%2Fhub%2Foverview
- type: Support
  url: https://www.mellow.world/support
- type: TermsOfService
  url: https://www.mellow.world/terms
apis:
- aid: mellow-world:mellow-world-api
  name: mellow-world API
  description: 'mellow-world API as documented publicly: 6 operations. Contract generated from the documentation by API Evangelist
    (2026-10-31); not the provider''s own document.'
  humanURL: https://www.mellow.world/hub/guides/schedule-posts-api
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/mellow-world-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/mellow-world-post-api-hub-v1-validate-request-schema.json
  - type: JSONSchema
    url: json-schema/mellow-world-post-api-hub-v1-posts-request-schema.json
  - type: JSONSchema
    url: json-schema/mellow-world-post-api-hub-v1-validate-response-schema.json
  - type: JSONSchema
    url: json-schema/mellow-world-post-api-hub-v1-posts-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages are HTML without machine‑readable OpenAPI or other contract files.
  evidence:
  - url: https://www.mellow.world/guides
    status: 200
  checked: '2026-10-31'
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 31
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

mellow-world API — frequently asked questions

Does mellow-world have an API?

Yes. APIs.io lists 1 API from mellow-world, including mellow-world API.

Is there an OpenAPI specification for the mellow-world API?

Yes. APIs.io indexes 1 OpenAPI specification for mellow-world, each linked for download from this page.

How do I authenticate with the mellow-world API?

mellow-world documents its authentication (1 scheme). The details are profiled on APIs.io as Mellow World Authentication.

How much does the mellow-world API cost?

APIs.io lists 3 pricing plans for mellow-world, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the mellow-world API ready for AI agents?

mellow-world has a Kin Score of 40.4 out of 100 (developing) and an Agent Readiness score of 37.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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